Method for transmitting paging messages, core network element, and network device

Abstract

Provided is a method for transmitting paging messages. The method is performed by a core network element. The method includes: transmit a first paging message; wherein the first paging message is configured for a network device to determine a timing for transmitting a second paging message, and the first paging message carries at least one of: position-associated information of a paged terminal or time-associated information.

1 . A method for transmitting paging messages, performed by a core network element, the method comprising:
 transmitting a first paging message;   wherein the first paging message is configured for a network device to determine a timing for transmitting a second paging message, and the first paging message carries at least one of: position-associated information of a paged terminal or time-associated information.   
     
     
         2 . The method according to  claim 1 , wherein the position-associated information comprises at least one of:
 registration position information of a terminal;   serving cell information associated with a serving cell that last served the terminal;   information of a tracking area to which a serving cell that last served the terminal belongs;   a satellite position associated with a satellite that last served the terminal;   neighbor cell information associated with a neighbor cell of a serving cell that last served the terminal;   a radio frequency fingerprint associated with a radio frequency that is present when the terminal was last served; or   position information of the terminal.   
     
     
         3 . The method according to  claim 2 , wherein the registration position information comprises at least one of: a tracking area (TA) list, a tracking area code (TAC) list or a tracking area identity (TAI) list; and/or
 the serving cell information comprises at least one of: a physical cell identity (PCI) of the serving cell or a frequency point of the serving cell; and/or   the radio frequency fingerprint comprises at least one of: a radar fingerprint, a microwave fingerprint, a wireless fidelity (Wi-Fi) fingerprint or a Bluetooth fingerprint.   
     
     
         4 . The method according to  claim 2 , wherein the position-associated information is acquired by at least one of the following manners:
 receiving a message reported over a non-access stratum (NAS) by the terminal; or   receiving a message reported over a network interface by a network device that has established a connection-state service with the terminal.   
     
     
         5 . The method according to  claim 1 , wherein the time-associated information comprises at least one of: a paging start time or a paging time window. 
     
     
         6 . The method according to  claim 5 , wherein the paging start time comprises at least one of: a coordinated universal time (UTC) or a relative time relative to time at which the first paging message is transmitted or received; and/or
 the paging time window comprises at least one of: the paging start time or a paging end time.   
     
     
         7 . The method according to  claim 5 , wherein the time-associated information is determined based on at least one of:
 position-associated information of the terminal;   orbit information of a satellite that is serving the terminal;   an orbit speed of the satellite; or   a beam coverage of the satellite.   
     
     
         8 . The method according to  claim 1 , further comprising:
 transmitting a number of transmission times of the second paging message.   
     
     
         9 . A network device, wherein the network device is configured to:
 receive a first paging message from a core network element;   wherein the first paging message is configured to determine a timing for transmitting a second paging message, and the first paging message carries at least one of: position-associated information of a paged terminal or time-associated information.   
     
     
         10 . The network device according to  claim 9 , wherein the network device is further configured to:
 transmit the second paging message.   
     
     
         11 . The network device according to  claim 10 , wherein the timing for transmitting the second paging message comprises a timing at which at least one of the following conditions is satisfied:
 information of a tracking area broadcast by the network device belongs to registration position information of a terminal;   serving cell information associated with the network device matches serving cell information provided by the core network element, wherein the serving cell information provided by the core network element indicates information associated with a serving cell that last served the terminal;   a distance between a satellite position of the network device and a satellite position provided by the core network element is less than a threshold, wherein the satellite position provided by the core network element indicates information associated with a satellite that last served the terminal;   a coverage area of the network device comprises an area indicated by position information of the terminal;   the network device detects a radio frequency fingerprint, wherein the radio frequency fingerprint indicates information associated with a radio frequency is present when the terminal was last served;   a paging start time indicated by the first paging message is reached; or   a current time falls within a paging time window indicated by the first paging message.   
     
     
         12 . The network device according to  claim 10 , wherein the network device is configured to transmit the second paging message once or multiple times. 
     
     
         13 . A core network element, wherein the core network element is configured to:
 transmit a first paging message;   wherein the first paging message is configured for a network device to determine a timing for transmitting a second paging message, and the first paging message carries at least one of: position-associated information of a paged terminal or time-associated information.   
     
     
         14 . The core network element according to  claim 13 , wherein the position-associated information comprises at least one of:
 registration position information of a terminal;   serving cell information associated with a serving cell that last served the terminal;   information of a tracking area to which a serving cell that last served the terminal belongs;   a satellite position associated with a satellite that last served the terminal;   neighbor cell information associated with a neighbor cell of a serving cell that last served the terminal;   a radio frequency fingerprint associated with a radio frequency that is present when the terminal was last served; or   position information of the terminal.   
     
     
         15 . The core network element according to  claim 14 , wherein the registration position information comprises at least one of: a tracking area (TA) list, a tracking area code (TAC) list or a tracking area identity (TAI) list; and/or
 the serving cell information comprises at least one of: a physical cell identity (PCI) of the serving cell or a frequency point of the serving cell; and/or   the radio frequency fingerprint comprises at least one of: a radar fingerprint, a microwave fingerprint, a wireless fidelity (Wi-Fi) fingerprint or a Bluetooth fingerprint.   
     
     
         16 . The core network element according to  claim 14 , wherein the position-associated information is acquired by at least one of the following manners:
 receiving a message reported over a non-access stratum (NAS) by the terminal; or   receiving a message reported over a network interface by a network device that has established a connection-state service with the terminal.   
     
     
         17 . The core network element according to  claim 13 , wherein the time-associated information comprises at least one of: a paging start time or a paging time window. 
     
     
         18 . The core network element according to  claim 17 , wherein the paging start time comprises at least one of: a coordinated universal time (UTC) or a relative time relative to time at which the first paging message is transmitted or received; and/or
 the paging time window comprises at least one of: the paging start time or a paging end time.   
     
     
         19 . The core network element according to  claim 17 , wherein the time-associated information is determined based on at least one of:
 position-associated information of the terminal;   orbit information of a satellite that is serving the terminal;   an orbit speed of the satellite; or   a beam coverage of the satellite.   
     
     
         20 . The core network element according to  claim 13 , wherein the core network element is further configured to:
 transmit a number of transmission times of the second paging message.